These caterpillars had an extraordinary behaviour
observed in October in Kuranda, Queensland.
The caterpillars each positioned themselves so that they were
hanging on under a stem between penultimate and final leaves on that stem.
There were many caterpilars of the same species on the tree,
and they looked at first glance to
be the catkin flowers of the tree. Only closer inspection revealed
that the "flowers" were in fact caterpillars.
They had a length of about 6 cms.

Pupation occurs in a folded leaf with no cocoon.
The pupae are brown with two black spots at the head.

The adult moths are large for the family, reaching a wingspan
of up to 8 cms.
Whilst being somewhat variable, they are generally dark blue with
clear areas in the wings, and an irregular row of orange spots
around the outer edge of each hind wing.
The body is banded in dark blue and orange.